package Ch02.Shili.Sl1;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.FileOutputStream;

public class Demo3 {
    public static void main(String[] args)throws Exception {
        //得到Dom解析器的工厂实例
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        //从DOM工厂获得DOM解析器
        DocumentBuilder db = dbf.newDocumentBuilder();
        //解析xml文档，得到一个Document对象，即Dom树
        Document doc = db.parse("src/Ch02/Shili/Sl1/box.xml");
        //创建Brand节点
        Element brandElement=doc.createElement("Brand");
        brandElement.setAttribute("name","三星");
        //创建Type节点
        Element typeElement=doc.createElement("Type");
        typeElement.setAttribute("name","Notex");
        //添加父子关系
        brandElement.appendChild(typeElement);
        Element phoneElement=((Element) doc.getElementsByTagName("PhoneInfo").item(0));
        phoneElement.appendChild(brandElement);
        //保存XMl文件
        TransformerFactory transformerFactory=TransformerFactory.newInstance();
        Transformer transformer=transformerFactory.newTransformer();
        DOMSource domSource=new DOMSource(doc);
        //设置编码类型
        transformer.setOutputProperty(OutputKeys.ENCODING,"utf-8");
        StreamResult result=new StreamResult(new FileOutputStream("src/Ch02/Shili/Sl1/box.xml"));
        //把DOM树转换为XML文件
        transformer.transform(domSource,result);
    }
}
